## Spherical Trigonometry, for the Use of Colleges and Schools |

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ambiguity angular points angular radius approximately arcs are drawn arcs drawn arcs which join bisecting centre circular measure corresponding cos a cos cos TU cos2 cosines Crown 8vo deduce denote determine equation escribed circles example expression faces fixed points formulae in Art greater hedron Hence hypotenuse inscribed Legendre's Theorem less lune meet middle point Napier's analogies Napier's Rules observed obtain octahedron opposite angle opposite sides parallelepiped Plane Geometry plane triangle Plane Trigonometry polar triangle pole polygon position preceding Article primitive triangle produced quadrant regular polyhedron respectively result right angles right-angled triangles shew shewn Similarly sin b sin sin2 sine small circle described solid angles solution sphere spherical excess spherical triangle spherical triangle ABC Spherical Trigonometry straight lines subtended suppose surface tangent three plane angles touching circle Trigono zero